No, that's not what I'm talking about. To try to secure against the analog hole you have to increase background checks, only open documents in secure areas etc.

No, that's not what I'm talking about. To try to secure against the analog hole you have to increase background checks, only open documents in secure areas etc. What I'm talking about is a light way to secure documents that are sent with trustworthy technicians out in the field, to prevent against consequences from honest mistakes, not intentional spying. This worked pretty well in first tests and for the clients demands (but every company should make sure to verify it for their own requirements). What Microsoft tried to sell us on was that SharePoint should be able apply this lightweight protection automatically to these files.